RUSSIAN police are investigating the brutal deaths of five teens during a birthday party for a 15-year-old girl.

Mikhail Paramonov, 17, allegedly went on a killing spree after a 14-year-old girl refused his advances, according to Russian reports.

The murders, involving stabbings and a gas canister explosion, took place at a country house in Baikalsk, in Russia’s Irkutsk region, on Tuesday night.

Mikhail, the oldest at the party, allegedly became “heavily intoxicated”, attacking and killing four teenagers with a knife, reports claim.

The victims have been named as Polina Markova, 16, Nikolai Malyshev, 13, Vadim Pavlushkin, 14, and Oybek Bondursky, 14.

Among the 14 at the party, four teens were also wounded.

One girl, Veronika, 15, remarkably survived by pretending to be dead after being stabbed, according to reports.

When the attacker left the room, she managed to escape and alerted a neighbour, who then raised the alarm.

The neighbour, along with some of the teenagers, called the police.

Mikhail ran back into the house and set the house on fire, opening the gas canister, according to reports.

Viktoria, 14, managed to escape seconds before the gas explosion.

She saw Mikhail “opening a gas canister” and setting the house on fire.

Mikhail was killed in the fire and was found by police “naked and holding a knife”.

Anastasia Sinota, 15, whose birthday was being celebrated, escaped the horror.

Some reports say that the four dead were killed in their sleep but this has not been confirmed.

Police found five the bodies of four boys and one girl in the burnt house.

Most of the children had told their parents they were staying with friends, according to reports.

Their parents were unaware they had travelled to a “dacha” – or country house – for a party, some 125 miles from regional capital Irkutsk city.

The children all attended the same School Number 11 in Baikalsk, but Mikhail – a young wrestler – had left.

Regional children’s ombudswoman Tatyana Afanasyeva said: “As a result of this terrible crime, five teenagers were killed, including the attacker.

“Four were hospitalised.

“Three minors are receiving psychological assistance, they are in a state of profound shock.

“One minor was operated on, and may be transported to Irkutsk for further treatment, depending on his condition.”

Irkutsk Region Governor Igor Kobzev said one of the victims was seriously wounded.

“The wounded children were hospitalised.

“A 14-year-old teenager with neck wounds is in extremely serious condition.”

The Russian Investigative Committee has launched a full probe into the murders.

A statement read: “At some point, one of them attacked those present with a knife.”

It added: “As a result, four teenagers died at the scene, and another four were taken to the hospital with various injuries.

“The suspected attacker set the house on fire after the attack and died in the resulting fire.”

A former classmate said: “Everyone is shocked, of course, that [Mikhail] could do such a thing.

“He was a good person, but with stupid jokes.

“He always helped whoever he could, he was popular with girls.

“But after the 10th grade he left because he couldn’t handle the school programme.”

The wounded children have been named as Viktoria ‘Vika’ Vishnyakova, 14, Veronika Rakitneko, 15, Ruslan Fedotov, 14, and Dmitriy Semyon, 15.

Five others safely left the scene of the massacre.